Hi SeDiceBisonte!
Thanks for your long response! I don't think you are being critical at all, don't worry, I posted it to get criticism and you are bringing up some fair points!
I did a couple of edits trying to incorporate some of your points:


I agree that the background might be a little bit disjointed, probably the fact that I didn't have any plans for it whatsoever is showing through

I tried to incorporate a color from the main figure (in this case the tattoos) to the background instead of the other way around because the pink was kind of too cool tone to incorporate it to the figure, in my opinion, without having to change a lot the color palette. I also got rid of the white frame since I don't feel was doing a lot for the overall composition.
I also tryied to get rid of single pixels in lines that where supposed to be continued. I often tend to break the lines when I feel is getting kind of jagged, and I know that usually doesn't translate as I was intended, since is a criticism that I get a lot, so thanks for bringing it again one more time.
Regarding the lines around the mouth, I agree that are kind of aging the figure... but is supposed to be a self portrait, and I am afraid I am not longer 20, so I am ok with that

Now, maybe I am misinterpreting the piece of advice here and I am missing an oportunity to get it better, please feel free to coment again.
As per your last point, I usually feel intimidated with high contrasting colors, so I can see how volumes are a little bit flat, but as you can see I didn't even had the courage to try to fix it in my edit!